I have a consistent issue of some legit emails showing up in my Mail client (OS X Mavericks) as junk. They are also marked as junk in icloud.com which is why they are coming in as junk to my mail client. The problem is, these emails can't be marked as "Not Junk" even in icloud.com. I can mark them "Not Junk" and they will immediately be marked as junk again and reappear in my junk folder.
How can I get iCloud to accept that these messages are not junk and leave them set that way?